package main
import "fmt"
func main(){
	var jk interface{}
	jk = 123
	fmt.Println("jk = ", jk)
	fmt.Printf("jk = %d\n", jk)
	
	jk = 3.14159
	fmt.Println("jk = ", jk)
	fmt.Printf("jk = %f\n", jk)
	
	jk = "RuiGe"
	fmt.Println("jk = ", jk)
	fmt.Printf("jk = %s\n", jk)
}
